CN220317418U - Selenium dioxide continuous production system - Google Patents
Selenium dioxide continuous production system Download PDFInfo
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- CN220317418U CN220317418U CN202321241188.XU CN202321241188U CN220317418U CN 220317418 U CN220317418 U CN 220317418U CN 202321241188 U CN202321241188 U CN 202321241188U CN 220317418 U CN220317418 U CN 220317418U
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- Prior art keywords
- oxidation furnace
- oxygen
- selenium dioxide
- condenser
- production system
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- JPJALAQPGMAKDF-UHFFFAOYSA-N selenium dioxide Chemical compound O=[Se]=O JPJALAQPGMAKDF-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 238000010924 continuous production Methods 0.000 title claims abstract description 17
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 67
- 230000003647 oxidation Effects 0.000 claims abstract description 65
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 30
- 239000001301 oxygen Substances 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000003860 storage Methods 0.000 claims abstract description 9
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000002309 gasification Methods 0.000 claims abstract description 5
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 25
- 238000007599 discharging Methods 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000036284 oxygen consumption Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000003303 reheating Methods 0.000 abstract description 3
- 238000004806 packaging method and process Methods 0.000 description 12
- 229910052711 selenium Inorganic materials 0.000 description 10
- 239000011669 selenium Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000000428 dust Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 5
- 229910017604 nitric acid Inorganic materials 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 208000019462 Occupational injury Diseases 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model discloses a selenium dioxide continuous production system which comprises a liquid oxygen tank and an oxidation furnace, wherein the liquid oxygen tank, a gasifier, an oxygen buffer tank, a nitrate pot and the oxidation furnace are sequentially communicated, oxygen is sent into the gasifier through the liquid oxygen tank, liquid oxygen is sent into the oxygen buffer tank through gasification and then is metered into the nitrate pot and then enters the oxidation furnace, the oxidation furnace is provided with an oxidation furnace chamber with a heating function, a blanking pipe and an oxygen distributor are arranged in the oxidation furnace, the oxidation furnace is communicated with a primary condenser, the bottom of the primary condenser is connected with a movable finished product bin, and the selenium dioxide continuous production system further comprises a temporary storage tank. According to the selenium dioxide continuous production system, stable operation production is always carried out under the constant temperature and constant oxygen conditions through the oxidation furnace, continuous production is realized, the frequency of heating, cooling and reheating of the oxidation furnace is reduced, the service life of the oxidation furnace can be prolonged to a certain extent, the oxygen consumption is reduced, and the production capacity of a single furnace is also effectively improved.
Description
Technical Field
The utility model relates to a selenium dioxide continuous production system.
Background
The current production process of selenium dioxide in general enterprises mainly adopts an intermittent method for production, the process is to throw quantitative selenium raw materials into an oxidation furnace at one time, after selenium powder is heated to a certain temperature by an electric heating hearth, gaseous pure oxygen is introduced into the oxidation furnace, the oxygen is required to be introduced into nitric acid with a certain concentration and then can enter the oxidation furnace after being stripped, gaseous selenium steam and oxygen are subjected to oxidation reaction to generate gaseous selenium dioxide, the system is used for introducing the selenium dioxide steam into a condenser by keeping micro negative pressure, and the selenium dioxide steam is naturally cooled and crystallized to obtain solid selenium dioxide, after the selenium raw materials in the oxidation furnace are reacted, the furnace is stopped for cooling, the condenser is also cooled, after the condenser is cooled to a certain temperature, a valve at the bottom of the condenser is opened, selenium dioxide is discharged by manually striking the bottom of the condenser, then the selenium is manually packaged, and then the selenium raw materials are thrown into the oxidation furnace again, and the system is electrified for heating, and the process is repeated.
The process has the advantages of higher production cost, higher power consumption and higher energy loss due to continuous temperature rise and reduction; when the material is fed manually, the temperature is generally 200 ℃ because the furnace mouth of the oxidation furnace is opened, the selenium dioxide smoke dust is larger, the occupational injury to staff is larger, and the smoke dust has larger pollution to the workshop environment; the process yield is relatively low, in addition, the service life of the oxidation furnace is relatively short because of frequent temperature rise and temperature reduction of the oxidation furnace, and secondly, the temperature of the oxidation furnace is regulated by manually frequently regulating the heating belt current, and meanwhile, the oxygen flow is regulated, unqualified materials are easy to appear in the production process, and the process cannot be continuously produced, so that the technical improvement is provided for the prior art.
Disclosure of Invention
The utility model aims to provide a selenium dioxide continuous production system for solving the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the selenium dioxide continuous production system comprises a liquid oxygen tank and an oxidation furnace, wherein the liquid oxygen tank, a gasifier, an oxygen buffer tank, a nitric acid kettle and the oxidation furnace are sequentially communicated, oxygen is fed into the gasifier through the liquid oxygen tank, liquid oxygen is fed into the oxygen buffer tank through gasification and then is fed into the nitric acid kettle through metering, the nitric acid kettle enters the oxidation furnace again, the oxidation furnace is provided with an oxidation furnace chamber with a heating function, a blanking pipe and an oxygen distributor are arranged in the oxidation furnace, the oxidation furnace is communicated with a primary condenser, and the bottom of the primary condenser is connected with a movable finished product bin.
As still further aspects of the utility model: still include the groove of keeping in, the groove of keeping in is equipped with the lifting machine, and charging hopper is installed to unloading pipe top, and the groove of keeping in is put into to selenium powder, starts the lifting machine, drops into the unloading pipe through charging hopper with the selenium powder, then adds the oxidation stove, and the unloading pipe sets up the feed valve, closes the feed valve after the feeding and seals.
As still further aspects of the utility model: the first-stage condenser is sequentially communicated with the second-stage condenser, the water-sealed tank, the first-stage tail gas absorption tower and the second-stage tail gas absorption tower.
As still further aspects of the utility model: the primary condenser and the secondary condenser are both provided with tail gas fans, so that negative pressure is kept in the primary condenser and the secondary condenser, and a drainage effect is achieved.
As still further aspects of the utility model: set up agitator motor and rotatory scraper in the one-level condenser, the inner wall of one-level condenser is pressed close to rotatory scraper, can scrape the selenium dioxide on the one-level condenser inner wall.
Compared with the prior art, the utility model has the beneficial effects that:
according to the selenium dioxide continuous production system, stable operation production is always carried out under the constant temperature and constant oxygen conditions through the oxidation furnace, continuous production is realized, the frequency of heating, cooling and reheating of the oxidation furnace is reduced, the service life of the oxidation furnace can be prolonged to a certain extent, the oxygen consumption is reduced, and the production capacity of a single furnace is also effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of a continuous selenium dioxide production system.
In the figure: 1. a liquid oxygen tank; 2. a gasifier; 3. an oxygen buffer tank; 4. a nitric acid kettle; 5. a temporary storage groove; 6. a hoist; 7. a charging hopper; 8. an oxidation furnace; 9. oxidizing the hearth; 10. discharging pipes; 11. an oxygen distributor; 12. a first-stage condenser; 13. a second-stage condenser; 14. a water sealed tank; 15. a first-stage tail gas absorption tower; 16. a secondary tail gas absorption tower.
Detailed Description
Referring to fig. 1, in the embodiment of the utility model, a selenium dioxide continuous production system comprises a liquid oxygen tank 1 and an oxidation furnace 8, wherein the liquid oxygen tank 1, the gasifier 2, an oxygen buffer tank 3, a nitrate pot 4 and the oxidation furnace 8 are sequentially communicated, oxygen is sent into the gasifier 2 through the liquid oxygen tank 1, liquid oxygen is sent into the oxygen buffer tank 3 through gasification and then is metered into the nitrate pot 4 and then enters the oxidation furnace 8, the oxidation furnace 8 is provided with an oxidation furnace chamber 9 with a heating function, a blanking pipe 10 and an oxygen distributor 11 are arranged in the oxidation furnace 8, the oxidation furnace 8 is communicated with a primary condenser 12, the bottom of the primary condenser 12 is connected with a movable finished product bin 17, the total length of the oxygen distributor 11 is about 1000mm, DN32, the lower part is welded into a blind end, the pipe is distributed in a cross manner, the holes are uniformly punched, the aperture is phi 1.5mm, the height is 600mm, and the interval is 5mm.
In a preferred embodiment, the device further comprises a temporary storage tank 5, wherein the temporary storage tank 5 is provided with a lifting machine 6, a charging hopper 7 is arranged above the discharging pipe 10, selenium powder is placed into the temporary storage tank 5, the lifting machine 6 is started, the selenium powder is charged into the discharging pipe 10 through the charging hopper 7, then the selenium powder is added into the oxidizing furnace 8, the discharging pipe 10 is provided with a charging valve, the charging valve is closed after charging, the discharging pipe 10 is sealed, the insertion depth of the discharging pipe 10 must be always kept 50mm below the liquid level after the selenium powder is melted, and the pipe diameter of the discharging pipe 10 is kept above DN 100.
In a preferred embodiment, the primary condenser 12 is sequentially connected with the secondary condenser 13, the water sealed tank 14, the primary tail gas absorption tower 15 and the secondary tail gas absorption tower 16, a rotary scraper installed in the primary condenser 12 is started at fixed time, selenium dioxide adhered on the inner wall of the condenser is scraped off, a bottom valve is opened at fixed time, finished product selenium dioxide is placed in a storage bin 17, and then the finished product selenium dioxide is concentrated to a packaging machine for packaging.
In a preferred embodiment, the primary condenser 12 and the secondary condenser 13 are both provided with tail gas fans, so that negative pressure is kept in the primary condenser 12 and the secondary condenser 13 to play a role of drainage, and the negative pressure of the system is kept at about-2 kPa.
In a preferred embodiment, the primary condenser 12 is internally provided with a stirring motor and a rotary scraper, the rotary scraper is close to the inner wall of the primary condenser 12, selenium dioxide on the inner wall of the primary condenser 12 can be scraped off, and a tail gas pipeline from the secondary condenser 13 to the water-sealed tank 14 is inserted about 40mm below the water level, so that the water-sealed tank is periodically replenished with water while production is maintained.
The working principle of the utility model is as follows: the selenium powder is put into an oxidation furnace 8 at regular time, the oxidation furnace 8 is heated from a cold state to 570-580 ℃, the oxygen flow is gradually regulated to a normal value, the selenium powder continuously produces qualified selenium dioxide in the oxidation furnace 8, negative pressure is generated by an exhaust system and is led to a primary condenser 12, gaseous selenium dioxide becomes solid selenium dioxide along with the reduction of temperature in the condenser, the selenium dioxide in the primary condenser 12 is put into a finished product bin 17 through a bottom discharge valve at regular time, after the temperature of the selenium dioxide in the finished product bin 17 is reduced to normal temperature, the selenium dioxide is sent into an automatic packaging machine for automatic packaging, thereby realizing continuous production of the selenium dioxide, the furnace is stopped after a certain period of continuous production, residues in the oxidation furnace 8 are cleaned, meanwhile, finished product materials in a secondary condenser 13 are discharged through opening a bottom discharge valve, the selenium dioxide is sent into a packaging machine for packaging after the qualified detection, after the oxidation furnace 8 runs for a certain period, the oxidation furnace is contacted with pure oxygen of a certain period of time at a high temperature, part of the selenium dioxide is required to be periodically replaced, the charging hopper 7 is arranged at the top of the oxidation furnace 8, the selenium powder is conveyed into the charging hopper 7 through a lifting machine 6, the charging hopper 6 is fed into the charging valve 7, the charging valve is required to be quantitatively filled into the charging hopper 7, and the charging valve is controlled at regular time; a charging and discharging pipe 10 is arranged in the oxidation furnace 8, so that selenium powder is prevented from being mixed with gas-phase selenium dioxide and selenium steam in the oxidation furnace 8 in a contact manner in the discharging process, the temperature in the furnace can be effectively stabilized, the selenium powder in the discharging pipe 10 continuously melts and enters the furnace bottom along with heating, the liquid selenium level in the furnace of the oxidation furnace 8 is kept to be always stable at a certain height, the heating current is always kept constant at a certain current value, the liquid selenium temperature in the oxidation furnace 8 is kept to be stable at a certain temperature, the gasification rate of selenium is kept stable, oxygen can be ensured to be constantly at a certain flow rate, the oxidation furnace 8 is provided with two oxygen distributors 11, oxygen in the oxidation furnace 8 can be fully contacted with the selenium steam to complete oxidation reaction, selenium dioxide is generated, the selenium dioxide is led into a primary condenser 12 through exhaust system suction, condensation crystallization is realized, the selenium dioxide falls into a finished product bin 17 through cutting, then automatic packaging is realized through feeding into a full-automatic packaging machine, continuous output of the selenium dioxide is realized, negative pressure operation of the system adopts a micro negative pressure running, the tail gas fan negative pressure is adopted, a condenser outlet is arranged, a certain negative pressure is ensured, the oxygen inlet in the oxidation furnace 8 is kept at a certain negative pressure outlet, dust is recovered by a fan, and dust is 100% is recovered through a dust absorption tower;
the utility model mainly solves the problems that the selenium dioxide production process realizes continuous production by intermittent production, the oxidation furnace 8 can safely feed materials under the high-temperature condition when feeding materials into the oxidation furnace 8, and the mechanical feeding materials are realized by manual feeding, so that the on-site environmental pollution problem is well solved, meanwhile, the occupational injury of toxic and harmful dust in workshops to staff is greatly reduced, the frequency of heating, cooling and reheating is effectively reduced for the operation of the oxidation furnace 8, the service life of the oxidation furnace can be prolonged to a certain extent, the stable operation production of the oxidation furnace 8 under the constant temperature and constant oxygen condition is realized, the oxygen consumption can be reduced to a certain extent, and the production capacity of a single furnace is also effectively improved;
the utility model greatly reduces the electricity consumption for producing selenium dioxide to a certain extent, and compared with the traditional intermittent selenium dioxide production process and device, the electricity consumption of a ton product is reduced by about 25 percent;
the utility model can effectively improve the selenium dioxide production capacity, and because the heating, cooling, discharging, packaging and furnace cleaning are sequentially carried out and the feeding is circularly carried out in the traditional selenium dioxide production process, the utility model can realize one-time heating, long-period constant-temperature production, the discharging and packaging do not influence the operation of an oxidation furnace, and the selenium dioxide production capacity can be doubled in the same time;
the utility model can effectively improve the labor intensity of staff, can realize fully-closed operation during feeding, discharging and packaging, and particularly can realize automatic operation during discharging and packaging, and the traditional process is manual open operation.
It should be noted that, the foregoing embodiments all belong to the same inventive concept, and the descriptions of the embodiments have emphasis, and where the descriptions of the individual embodiments are not exhaustive, reference may be made to the descriptions of the other embodiments.
The foregoing examples merely illustrate embodiments of the utility model and are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (5)
1. Selenium dioxide continuous production system, including liquid oxygen jar (1) and oxidation furnace (8), its characterized in that, liquid oxygen jar (1), gasifier (2), oxygen buffer tank (3), nitrate pot (4) and oxidation furnace (8) communicate in proper order, and oxygen is sent into gasifier (2) through liquid oxygen jar (1), and liquid oxygen is sent into oxygen buffer tank (3) through the gasification, then lets in nitrate pot (4) through the measurement, reentry oxidation furnace (8), oxidation furnace (8) set up oxidation furnace (9) that have the heating function, install unloading pipe (10) and oxygen distributor (11) in oxidation furnace (8), oxidation furnace (8) intercommunication one-level condenser (12), movable finished product storehouse (17) are connected to the bottom of one-level condenser (12).
2. The continuous selenium dioxide production system according to claim 1, further comprising a temporary storage tank (5), wherein the temporary storage tank (5) is provided with a lifting machine (6), a charging hopper (7) is arranged above the discharging pipe (10), selenium powder is placed into the temporary storage tank (5), the lifting machine (6) is started, the selenium powder is charged into the discharging pipe (10) through the charging hopper (7), then the selenium powder is charged into the oxidizing furnace (8), the discharging pipe (10) is provided with a charging valve, and the charging valve is closed after charging.
3. The continuous selenium dioxide production system according to claim 1 or 2, wherein the primary condenser (12) is sequentially communicated with the secondary condenser (13), the water-sealed tank (14), the primary tail gas absorption tower (15) and the secondary tail gas absorption tower (16).
4. A selenium dioxide continuous production system according to claim 3, wherein the primary condenser (12) and the secondary condenser (13) are respectively provided with an exhaust gas fan, so that negative pressure is kept in the primary condenser (12) and the secondary condenser (13) to play a role in drainage.
5. The continuous selenium dioxide production system according to claim 1, wherein a stirring motor and a rotary scraper are arranged in the primary condenser (12), and the rotary scraper is close to the inner wall of the primary condenser (12) and can scrape selenium dioxide on the inner wall of the primary condenser (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321241188.XU CN220317418U (en) | 2023-05-22 | 2023-05-22 | Selenium dioxide continuous production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321241188.XU CN220317418U (en) | 2023-05-22 | 2023-05-22 | Selenium dioxide continuous production system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220317418U true CN220317418U (en) | 2024-01-09 |
Family
ID=89425813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321241188.XU Active CN220317418U (en) | 2023-05-22 | 2023-05-22 | Selenium dioxide continuous production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220317418U (en) |
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2023
- 2023-05-22 CN CN202321241188.XU patent/CN220317418U/en active Active
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